261257433 has 16 divisors (see below), whose sum is σ = 360806400. Its totient is φ = 167955200.

The previous prime is 261257431. The next prime is 261257441. The reversal of 261257433 is 334752162.

It is a cyclic number.

It is not a de Polignac number, because 261257433 - 2¹ = 261257431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 261257394 and 261257403.

It is not an unprimeable number, because it can be changed into a prime (261257431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98833 + ... + 101441.

It is an arithmetic number, because the mean of its divisors is an integer number (22550400).

Almost surely, 2^261257433 is an apocalyptic number.

It is an amenable number.

261257433 is a deficient number, since it is larger than the sum of its proper divisors (99548967).

261257433 is a wasteful number, since it uses less digits than its factorization.

261257433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3792.

The product of its digits is 30240, while the sum is 33.

The square root of 261257433 is about 16163.4598090879. The cubic root of 261257433 is about 639.2776950406.

The spelling of 261257433 in words is "two hundred sixty-one million, two hundred fifty-seven thousand, four hundred thirty-three".